Dental drill.



H. E. S. CHAYES.

DENTAL DRILL.

APPLICATION mw Aus. 15, 191s.

latoned Maly 28, 1913,

l ifo HERMAN E. S. CZ'AYES, OF NEW'YORK, N. Y.

DENTAL DRILL.

Specification of Letters Patent. 3

.lppliaten filed August 1G, 1915. Serial o. '-25,78.

ifo oZZ whom it may conocen Be it known that L HERMAN E. S. Cnixiih', n citizen o? the -nited States, Te- :iding ai the borough of Manhattan, in the (founi' of New York, city und Snie of New York.u have invented certain new and useful linpi'ofeinents in Denial Drills, of which lhe folhm'ing is. n speeifionlion.

Mv invemion relnes to ixnpz'ovemens in drilling: nmehines, particularly io those ndnped lo use in denistiyg Snell as described in ini Patent llo. Ll of May lflih. 19in? ind in which n device is de- SL-fibeii wilgen ein nin om inns pmnn to meh ohei..

The iingjiwgnvnienf-s coineinplaed :ind heifeiuil'ei set foith :we designed lo provide :i simple l'oi'in of device fi'oni which lhe drill may he easily ntlnehed and de ini-hed, enfi in which is mnininined n moislure and light condition willi respect palle. l nlfzinuggas will 3 nppaieni from. this lewiipliiin zind with reference to ehe l1-wenige in which: Figui-e l is a 'top plan view e, denial dyilling machine or. n large `@tion laken in lidlinvv il is n deail l plate. fl: 'lffeiini dish.

y a und i?, S is a oohed lio lhe end of :i lexihle shiii; whiih anmnits power fiom n well known manner. The is inonnefl in one endof n i'inine of which ie bifniened es: ne i l* Vlhe 'rfnine and adjacent lo here is mounted a veticzil Shaft upper end of whifh is jonlnzilf-d in the freine. i while the lower end linds n, heaving in n serai plug l threaded ino the lrmno F. @n ile i' unich ineohos Willi die geez S und :i pinion l2 which ineshe' Willi ri, gem" l-- which is mounted on n. veiticnl ge si i" holt i3 secured oetween the bilinronted end 1G hy :i nul: l?.

Two sim' lil-1S site also pivoted on 4he holt l5 one of them having a reduced end sind ehe ohei :i forked end 19 adaped lo enihrznfe the mlm-eil end of the other* arm. Two Infini pintas 'L20-2O are also mounted on the holt ciicnlzu in shape and of slightly larger diinneer than the gear 14, and designed lo eovei the top and bottom of lne gein'.

The large geni: il meshes with pinions which are 'foi-med on integral hubs 2l :1nd mounted within the ends of the :mns 1S. lt. is ohviouS fi-oni the description hus in?? that when power is transmit-ted through the gem-s S, ll. l2 und il Lo l'he pinions that the lutte-1' will 'revolve :it the saine Speed and tha the :mns l-S may he, s\-nng on the hohl 1:3 so ihm they can he olof e ogether as in l Fig. l or in nn extreme position close up lo the, freine 5,

The new devices for mounting the drills in posiion will non' he ilewfifihed :ind one de Srviiption will Sullii-iloi both of he nlins lf3-38. The end of die :mn lll is bored oui ou its lower Side :is nt 36, whieh bore ifounnunlentes with u hin'e 3l of Smaller dinlneei'. thus forminf.:r n Shoulder Tho upper end of 'the huh l on The pinion Q5 is jolu'nnled within ihe hone ill while the geni* .25 abuis ugainst he Slioulilei' 35 and is held in position hy n si'i'ev.' plug 2S hlended into the larger here ill?.

The seien' plu; 2S centrally fipertmed in line with n similar :ipeizure in the. huh Qi', lhe lntei' having :i feather 3i' formed nl. the top which is adapted to engage, :i eut-ont portion on ille end of n drill 3l moiined Within the hul and he. plug "he drill 8l is held in punition h5' n gi-ome nein* lh@ upper end ougiwing n, foil; formed in the end of lliili pinto 23S having a downwardly depeuiling reduced potion 39 which terminates in :i tail l0 extending; ai, righi angles, tl1ie1'efom- The lmil l0 lieS within a recess ll .in the lop of the. nini 18 which contains n spring coiled about the tziil and which presses against' the depending portion 39 so that fhe fork is normali)v held in engagement with the, groove 32 on the end oil' he drill 3l. Thus the drill 3l is held in engagement wiih ihe feather 3T on the huh :ind iauised to revolve. wii'h the pinion 2:3 engnging ihn geni ll, Means for disenjzzning (he drill 3l l'i'oni the pluie 38 :1re :is follow z-The top surface of the zizni 1S cui :Li'ny lo l'oim n depresfsion 4.3 which einiinules in. nn aeenme reins all foi'n'ied hy.' :in upwnidly extending flange on ihe end of the ni'in 1S.

ll'vi'hin ihe reees' l (here is niounfed a disk 46 hning nn :innuhu' groove l? Lmid n depending cani or lng formed on its under side. The un is adapted to engage the end of #he plate 38 when the disk is Turned in eilher diieciion and il, will push 

